Thermosiphon radiator



1,629298 May 17,1921. Lv' FENCE THERMOS IPHON RADIATOR Filed Sept. 10, 1925 W Lafe Pence.

I rrh I I Patented May 17, 1927;

nnrnrv. PENCE, or EL rnso'; TEXAS;

mazes THERMOSIPHON RADIATOR.

Application filed September 110; 19.25%. Scrial No.1 55,7116:

This invention relates to radi'ators for'use with ther'mosiphon cooling systems for internal combustion engines, particularly automotive vehicle engines. 7

It is an object of this invention to pro vide a radiator for use in thermosiphon cooling systems adapted to maintain a water seal on the top of the radiator core when the water is low in the top tank of the radiator. In thermosiphon water cooling systems the water circulation and consequently the cooling elfect of the radiator is stopped when the water level becomes low enough to uncover the top of the radiator core. With a top tank of sufiicient capacity to give a large reserve supply of water, the back of the tank must project underneath the engine hood, and when the vehicle is climbing a grade the water runs to the back of the tank uncovering the radiator core and stopping circulation even with some water in the tank. To overcome this effect I have provided a battle plate immediately above the water inlet and close to the radiator core, to cause the water to flow over the core before reaching the radiator top tank, thus preventing the water from draining away from the core when the vehicle is climbing a grade.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

This invention, in a preferred form, is illustrated on the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a fragmentary elevational view of an automotive vehicle engine and radiator assembly embodying features of this invention.

Figure :2 is an enlarged section of the radiator of this invention shown in the position assumed when the vehicle is climbing a grade.

Figure 3 is a section on the line IIIIII of Figure 2.

Figure 4 is a section on the line IV-IV of Figure 2.

As shown on the drawings:

The cylinder block 10 of an engine is shown in Figure 1 together with the cold water connection 11 from the radiator bottom tank 12 to the cylinder jacket 13, and

ator; A radiator-wore 16' of conventional construction connects the top and-bottom tanks and completes the essential structure of a thermosiphon engine cooling system wherein temperature ditlerences and the corresponding water densities form the only means for circulating the cooling water.

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The present invention relates to a spe-' cial form of radiator top tank and the water inlet thereto. In order to obtain a large re-..

serve capacity in the cooling system the top tank 15 is extended rearwardly beneath the hood position and preferably curved to conform to the shape of the hood to obtain maximum capacity. With such a tankextension 17 the water 18 therein would.v flow to the rear when the vehicle is climbing a A baffle plate 19 is mounted close to the bottom of the top tank 15 and sealed to the tank walls along its sides and rear, the front edge 20 being slightly spaced from the front Wall 21 of the tank to provide a Water passage. The jacketoutlet connection 14 opens into the bottom of the tank 15 below the baffle plate and spreads the water out to improve the supply thereof to the sides of the radiator core. This baffle plate prevents even a small remaining'body of water in the tank from flowing to the rear and uncovering the top of the radiator core, regardless of the grade the vehicle may be climbing. I With this arrangement a longrearward extension of the top tank is practical and therefore gives a largely increased reserve supply of water.

I am aware that numerous details of con struction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

1. In a vehicle radiator comprising top and bottom tanks and a core therebetween, a baflie plate in the top tank positioned above the inlet to the top tank and extending over the top of the core, the space above the baffle plate defining additional water storage space, the sides and rear of said plate being sealed to the walls of the top tank.

2. In a radiatorof the class described" a top reserve tank, a Water inletinto the bot tom of said-tank, a baffle slightly spaced from the bottom of the tank'and extending to a point close to the front Wall, of the tank, the side and rear edges of said baflle being sealed to the Walls of the tank. I

3. In a radiator, a core a top tank projecting rearwardly beyond the limits of the core, a water inlet to said tank, a partition plate in said tank positioned above and adjacent said inlet and sealed to the Walls of said tank except immediately above tlie'leading edge of the core.

4. An extension tank for vehicle radiators having a fluid inlet at the bottom and an outlet to the core at the 'front, and a partition immediately above the inlet and extending over the outlet, said partition being slightly spaced from the front wall of the tank to provide a fluid passage.

In testimony whereof I have hereunto snbscribed my name.

7 LAFE V. FENCE. 

